2) The condensation of compound (I) with 2-chloroethyl isocyanate (III) by means of silver carbonate in acetonitrile water gives methyl 6-[[-(2-chloroethyl) amino]carbonylamino]-6-deoxy-alpha-D-glucopyranoside (IV), which is then nitrosated with NaNO2 in aqueous acetic acid
1) By condensation of methyl 6-amino-6-deoxy-alpha-D-glucopyranoside (I) with 2-nitrophenyl N-(2-chloroethyl)-N-nitrosocarbamate (II) in THF / methanol. The 2-cyanophenyl ester analogue of compound (II) can also be used.